Syndicate content

Urban Development

From algorithms to virtual reality, innovations help reduce disaster risks and climate impacts

Ede Ijjasz-Vasquez's picture
(Courtesy of Red Cross Red Crescent Climate Centre)
 

Natural disasters such as floods and droughts disproportionally affect the poor and vulnerable people, causing thousands of fatalities each year. If no further adaptation is pursued, climate change induced increases in disaster risk and food shortages may push an additional 100 million people into poverty.
 
Today, we celebrate the annual World Red Cross and Red Crescent Day. To reduce the impacts of disasters on the poorest and most vulnerable, and build their resilience, it is essential that we collaborate and innovate to bring solutions to the community level. Close coordination with the humanitarian sector is therefore more important than ever before.
 
The World Bank and the Global Facility for Disaster Reduction and Recovery (GFDRR) have a strong ongoing partnership with the Red Cross Red Crescent—the world’s largest humanitarian network—and in particular the Red Cross Red Crescent Climate Centre.
 
Better disaster-risk data for timely forecast and rapid financing

Building more affordable and disaster-resilient housing in Latin America and the Caribbean: a few policy ideas

Julian Palma's picture
Photo by C64-92 via Flicker Creative Commons

Between 2010 and 2017, Chile was struck by 10 major natural hazard events. These disasters affected as many as 340,583 houses and cost $3.6 billion in reconstruction (Ministry of Housing and Urbanism of Chile). Post-disaster assessments point to housing as one of the most affected sectors in the wake of climate-related and other natural hazards—most commonly floods, earthquakes, landslides, and fires. In a 22-year period between 1990 and 2011, minimum losses in the housing sector for 16 countries in Latin America and the Caribbean (LAC) amounted to $53 billion.

In the LAC region, one quarter of the population lives in slums, characterized by the prevalence of substandard housing quality as well as incremental and self-construction of homes. Families living in these informal settlements are at greatest risk to natural hazard impacts. Programs providing new housing do not always reach families in the lowest quintiles; and without access to affordable and well-located housing alternatives, households have no other option than to build informally, and in areas most prone to natural disasters.

Jobs in Africa: Designing better policies tailored to countries’ circumstances

Klaus Tilmes's picture

Dar es Salaam, Tanzania – one of the many cities in Africa that is expected to see sharp population increases – will need rapid job creation to keep pace with its swift population growth. The city’s new bus transit system – completed in 2015, with a $290 million credit from the International Development Association, the World Bank’s fund for the poorest countries – is now reducing transportation costs, easing traffic and promoting private sector development.
Photo: Hendri Lombard / World Bank


Africa’s working-age population is expected to grow by close to 70 percent, or by approximately 450 million people, between 2015 and 2035. Countries that are able to enact policies conducive to job creation are likely to reap significant benefits from this rapid population growth, according to the Africa Competitiveness Report 2017, co-produced by the World Bank Group, the African Development Bank, and the World Economic Forum. The report also warns that countries which fail to implement such policies are likely to suffer demographic vulnerabilities resulting from large numbers of unemployed and underemployed youth.

Building a more resilient Afghanistan

Ditte Fallesen's picture
Helping Afghanistan Become More Resilient to Natural Disasters


This blog is part of a series highlighting the work of the Afghanistan Disaster Risk Management and Resilience Program

During the almost 4 years I spent in the World Bank office in Kabul, I experienced frequent earthquake tremors and saw the results of the significant reduction in winter snow, which severely impacts the water available for agriculture during spring and summer.
 
While limited in scope, my first-hand experience with natural disasters adds to the long list of recurring hazards afflicting Afghanistan. This list is unfortunately long and its impact destructive.
 
Flooding, historically the most frequent natural hazard, has caused an average $54 million in annual damages. Earthquakes have produced the most fatalities with 12,000 people killed since 1980, and droughts have affected at least 6.5 million people since 2000.

Climate change will only increase these risks and hazards may become more frequent and natural resources more scarce. Compounded with high levels of poverty and inadequate infrastructure, the Afghan population will likely become more vulnerable to disasters.

Risk information is critical to inform development planning, public policy and investments and over time strengthen the resilience of new and existing infrastructure to help save lives and livelihoods in Afghanistan.

Các dự án đầu tư đột phá giúp kinh tế Việt Nam phát triển

Kristalina Georgieva's picture

Available in english



Tháng trước tôi có dịp sang công tác tại Việt Nam. Những tiến triển mạnh mẽ tại đây so với 17 năm trước đã gây cho tôi một ấn tượng mạnh.

Năm 2000, kênh Nhiêu Lộc – Thị Nghè chảy qua khu trung tâm Thành Phố Hồ Chí Minh còn ô nhiễm và gây ảnh hưởng xấu lên sức khỏe người dân sống và làm việc trong khu vực. Nhưng hôm nay, dòng kênh đã được cải tạo với dòng nước trong và sạch, mang thêm màu xanh và sức khỏe cho 1,2 triệu người sống tại khu vực này – một khu đô thị đang phát triển nhanh chóng.

Lagging lands, violent lands

Somik Lall's picture
Today, over 2 billion people live in lagging and violent lands with the processes of economic isolation and violence closely linked. In Africa, close to 600 million people live within 90 minutes of violence. The issue of "lagging lands, violent lands" was examined at a World Bank seminar on April 22. The session focused on identifying options for stimulating sustainable and inclusive economic growth in lagging lands and urban spaces to bridge economic and social divisions and mitigate conflict and human vulnerability. An integrated policy framework combining the main thrusts of the World Development Report (WDR) 2009 on Reshaping Economic Geography and the WDR 2011 on Conflict, Security, and Development was at the core of diagnosing challenges and identifying solutions.

There is need for urgent action toward a global solution to leave no area behind because persistent spatial disparities in living standards can adversely affect national unity and social cohesion, foster political instability, and increase the risk of conflict. In identifying priorities, it is essential to remind ourselves that leaving no area behind is NOT equal to “doing the same everywhere.” And to advance on the lagging areas agenda, we must recognize that the heterogeneity of challenges across territories needs to be met with a heterogeneity of policy instruments. To leave no area behind, each local challenge needs to be matched with a specific set of policy instruments. Policies should seek unity, NOT uniformity.

Strengthening the link between research and policy for a combined agenda is critical. Georeferenced data provides a tremendous opportunity for analysis of risk factors. In East Africa, for example, the issue of lagging lands is addressed by work in high-risk and conflict-affected areas, by addressing the underlying drivers of vulnerability and by reducing exposure to hazards of people. In the Horn of Africa, the EU has successfully applied geographical targeting in cross-border areas across the region, collaboration across borders through specific actions, and a regional approach based on research and evidence. In Cali, Colombia, the “Territories of Inclusion and Opportunities,” a land-based strategy addressing multiple risk factors, has been a successful tool in combating poverty, exclusion and violence.

South Asia’s ports: Expensive and slow

Matias Herrera Dappe's picture
 
Are South Asia’s Container Ports Competitive?


Many countries, developed and developing, that want to become more competitive in global markets tend to jump to a quick conclusion that they need to invest more in infrastructure, particularly in transport sectors like ports. But while many regions, including South Asia, do face important infrastructure gaps, massive new investment is not the only way to improve regional competitiveness. Countries should realize that they also have significant potential to make more efficient use of the infrastructure they already have.
 
Building megaports all along the coast might reduce a country’s trade costs, but it also requires hundreds of millions of dollars in investment. Improving the performance of existing ports, enabling them to handle higher levels of cargo with the same facilities and in a shorter time, can be a far more cost-effective approach to reducing transport and trade costs. Closing the infrastructure gap does not just require more infrastructure, but also better infrastructure, and better use of existing infrastructure.
 
The report Competitiveness of South Asia’s Container Ports, which we launched today, provides the first comprehensive look at the 14 largest container ports in South Asia, which handle 98 percent of the region’s container traffic. It focuses on port performance, drivers, and costs. 

Transformative investments shape Vietnam’s economic rise

Kristalina Georgieva's picture
Watch Video


I was in Vietnam last month and I was so impressed by the tremendous progress the country has made compared to what I had seen 17 years earlier.

In 2000, the Nhieu Loc–Thi Nghe canal in Ho Chi Minh City’s central business district was so polluted that it posed a health risk to everyone living and working there. How times have changed. The canal’s water is now clear, contributing to a greener and healthier urban living for 1.2 million people in the rapidly expanding metropolis.

Mapping and measuring urban places: Are we there yet? (Part 2/2)

David Mason's picture
Photo by Anton Balazh via Shutterstock

My previous blog post surveyed some of the recent trends in developing global measures of urbanization. In this post, I want to turn to a brief discussion for scholars and practitioners on some possible applications and areas of focus for ongoing work:
 
[Download draft paper "Bright Lights, Big Cities: a Review of Research and Findings on Global Urban Expansion"]
 
While there are a number of different maps for documenting urban expansion, each has different strengths and weaknesses in application. Coarser resolution maps such as MODIS can be used for mapping the basic contours of artificial built-up areas in regional and comparative scales. On the other hand, high-resolution maps are best suited for individual cities, as algorithms can be used to identify and classify observed colors, textures, shading, and patterns into different types of land uses. These levels of detail are difficult to use for reliable comparisons between cities as the types of building materials, structure shapes, light reflectivity, and other factors can vary widely between countries and regions.
 
Nonetheless, there are a number of applications for policymakers in this regard, from identifying and mapping green spaces and natural hazard risks to identifying and tracking areas of new growth, such as informal settlements. However, such approaches to land use detection require careful calibration of these automated methods, such as cross referencing with other available maps, or by “ground truthing” with a sample of  street-level photos of various types of buildings and land cover as reference inputs for automation. One solution to this is the use of social media and geo-coded data to confirm and monitor changes in urban environments alongside the use of high-resolution satellite imagery.
 
Nighttime light maps also have gained traction as measures of urban extent and as ways to gauge changes in economic activity in large urban centers. They are probably less useful for documenting smaller settlements, which may be dimmer or have little significant variation in brightness. It is important to correct these types of maps for “overglow” measurement effects—where certain light may “bleed” or obscure the shapes and forms of very large, bright urban areas in relation to adjacent smaller and dimmer settlements (newer VIIRs maps have made some important advances in correcting this).

Mapping and measuring urban places: Are we there yet? (Part 1/2)

David Mason's picture
Source: Deuskar, C., and Stewart B.. 2016. “Measuring global urbanization using a standard definition of urban areas: Analysis of preliminary results” World Bank
This satellite image shows Sao Paolo's estimated “urban areas” based on a WorldPop gridded population layer. Areas in yellow are areas with at least 300 people per km2 and a known settlement size of 5,000 people. Red areas represent a population density threshold of at least 1,500 people per km2 and a known settlement size of 50,000 people.
There remains a surprising amount of disagreement over precisely what “urban” means despite the ubiquity of the term in our work. Are urban areas defined by a certain amount of artificial land cover such as permanent buildings and roads? Or are they more accurately described as spatially concentrated populations? The answer often depends on what country you are in, as their administrative definitions of urban areas can vary widely across and between these two dimensions.
 
Without a globally consistent measure of urban areas, it can be difficult to track changes in built-up areas (land surface coverage comprised of buildings and roads) and population growth across time and space. This impacts how policymakers may understand and prioritize the challenges cities face and what investments or reforms may be needed. In a new paper, “Bright Lights, Big Cities: a Review of Research and Findings on Global Urban Expansion,” I provide a brief introduction to some of the current approaches for measuring urban expansion and review the comparative findings of some recent studies.
The UN’s World Urbanization Prospects (WUP), perhaps the most comprehensive and widely cited measure of urbanization across the world, draws from a compilation of country-level population totals based on administrative definitions. A key weakness with this set is that since each country defines “urban” differently, it is difficult to accurately compare one country’s urbanization to another, as well as to estimate the urban population of a group of countries or the world itself. Recent work has provided more sophisticated ways to measure urban growth and expansion using both satellite map data and careful application of population data.

Pages